Honestly I wouldn't worry or focus on the Sparq score, Its important for your son to improve bat and arm speed, to the best of his ability. A lot of coaches will start by looking at an online video of your son and decide if they want to pursue him any further, so I would say putting a decent video of him would be a start. If he doesn't gain much arm and bat speed over the next year, he should consider attending a JC to develop his skills.
Good luck!
re: Sparq, I am not aware of any baseball program that focuses on finding kids with good sparq scores